On Mon, 24 Mar 2003, Kristof Pelckmans wrote:
> Hi all,
>
> I tried to use the dmix plugin, as mentioned :
> > pcm.dmix_analog {
> > type dmix
> > ipc_key 5678293
> > ipc_key_add_uid yes
> > slave {
> > pcm "hw:0,0"
> > }
> > bindings {
> > 0 0
> > 1 1
> > }
> > }
>
> When I do
> aplay -D dmix_analog tv.wav
> Playing WAVE 'tv.wav' : Signed 32 bit Little Endian, Rate 48000 Hz, Stereo
> aplay: set_params:810: Channels count non available
>
> The wav-file was recorded from my M-Audio Delta 410 card. Could this still be a
> problem with the driver ?
Can I see the output from 'aplay -v -D plug:dmix_analog tv.wav'?
> So next I tried to do
> aplay -D plug:dmix_analog tv.wav
> Playing WAVE 'tv.wav' : Signed 32 bit Little Endian, Rate 48000 Hz, Stereo
>
> Which plays some garbled sound, nothing that resembles what I recorded
The 32-bit mixing code is not debugged. Please, could you try to change
one line in pcm_dmix.c (alsa-lib/src/pcm/pcm_dmix.c) from
'#ifdef __i386__' to '#ifdef __i386XX__' and recompile library?
We'll see then if it's a problem with the i386 assembler code.
> The strange thing is that the dshare plugings work (no distorted sound),
> as long as I specify the 'plug' plugin : aplay -D plug:dshare_right
> tv.wav
>
> I'm confused about this behaviour, since I thought the memory mapping
> for dmix and dshare would be relatively similar.
>
> One last question : can you combine dmix and dshare ?
Nope. If you use only one application for specific channels (dmix plugin)
then you'll get same results as dshare. The only difference is that dshare
transfers are a bit more optimized (it does only copy not sum of samples).
Perhaps we can optimize dmix in this way later.
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs
-------------------------------------------------------
This sf.net email is sponsored by:ThinkGeek
Welcome to geek heaven.
http://thinkgeek.com/sf
_______________________________________________
Alsa-devel mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/alsa-devel
